http://en.wikipedia.org/wiki/Rail_transport
Think
http://www.think-railways.com/
Magazine
http://www.railmagazine.com/
Society
http://www.irtsociety.com/
World
http://www.sinfin.net/railways/world/
Research
http://www.railway-research.org/
Tube
https://www.youtube.com/results?search_query=rail
Slides
http://www.slideshare.net/search/slideshow?searchfrom=header&q=rail
Urban
http://www.urbanrail.net/
Technology
http://www.railway-technology.com/
Think
http://www.think-railways.com/
Magazine
http://www.railmagazine.com/
Society
http://www.irtsociety.com/
World
http://www.sinfin.net/railways/world/
Research
http://www.railway-research.org/
Tube
https://www.youtube.com/results?search_query=rail
Slides
http://www.slideshare.net/search/slideshow?searchfrom=header&q=rail
Urban
http://www.urbanrail.net/
Technology
http://www.railway-technology.com/
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